Trump will take over the office of president on January 20 officially completing the transition from one president to the next. Many are wondering what will become of President Barack Obama's environmental legacy. CCTV's Jessica Stone takes a closer look.

The top environmentalist in the U.S. government says she's proud of new protections and policies enacted under President Barack Obama.

"We are in a spectacularly different place today than we were when President Obama took office. Before, developing countries would point a finger at us. Now, they're wondering if the U.S. will turn its back on science and be left behind," said Gina Mccarthy, EPA administrator. 

Left behind -- because the next U.S. president -- Donald Trump -- has vowed to roll back key environmental regulations like the U.S. Clean Power Plan and the Paris Climate Agreement aimed at combating global warming.

He's also put Myron Ebbel in charge of finding the next environmental leader in a Trump administration. Ebbel believes climate change is a political movement, not a scientific fact.

And Trump, himself, has promised to bring back jobs in America's coal country.

He said, "We're going to put the miners back to work, we're going to put the miners back to work."

"But with nearly 200 countries in the Paris Climate Agreement pledging to lower carbon emissions, what can Donald Trump do to unravel the deal? For a start, he can change the domestic regulations that help the U.S. meet its Paris commitments but even then, he has to wait four years to fully withdraw," Jessica Stone said.

According to the Center for Climate and Energy Solutions, repealing these regulations requires a new plan, new public comment period, and if there is no replacement, the government risks a lawsuit.

Analysts also say Trump can cancel U.S. participation in the Paris agreement, but it would mean a loss for U.S. companies that make renewables, a market supported by global businesses to the tune of $286 billion last year.